Receiver



July 28, 1925. 1,547,343

E. B. NOWOSIELSKI RECEIVER Filed Jan. 1923 I g: A, 3

INVENTOR [OW/7E0 B No was/45m ATTO NE) Patented July 28, 1925.

UNITED STATES 1,541,343 PATENT OFFICE.

EDWARD B. NOWOSIELSKI, BLOOHFIELD, NEW JERSEY; ASSIGNOR TO SPLI'IDORI' ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY nncnrvnn.

Application filed January 29, 1923. Serial No. 615,591.

To all whom it may concern:

Be it known that I, EDWARD B. NoWosrnL- SKI, acitizen of the United States, residing at Bloomfield, in the county of Essex, State of New Jersey, have invented certain new and useful Improvements in Receivers, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

This invention relates to improvements in receivers such as used for the reception and conversion of electrical impulses into sound waves. The inventiomis particularly useful for head receivers of the ordinary telephone type or such as are used in the reception of wireless messages.

One of the objects of my invention is to provide a construction .inwhich the terminals for the electromagnet used in the receiver, are mounted on a disc of insulating material. .These terminals also being utilized to receive the terminals of the connecting cord.

range the insulating disc carrying said cord and electro-magnetic terminals in such a way that it serves to clamp and hold the permanent magnet and electro-magnets in the receiver casing.

Another object of m invention is'to provide a simple but effective means for holding the spool heads of the electro-magnets in position on their respective cores.

5 Other and further objects will be apparent to one skilled in the art after a study of the annexedspecification taken in connection with the attached drawing, wherein:

. Figure 1 is a plan view of the receiver with the ear cap and dia hragm removed and with a portion of t e terminal disc broken awa thereby showing only .one of the termina s.

Figure 2 is a sectional view through a por- 6 tion of the disc and the terminals. I

Figure 3 is a section on the line. 3/3 of Another object of my invention is to arconnectors 11 have an extended ing as is clearly indicated. Extending from the pole ends are pole pieces 3 which terminate in core ends. The bottom of the-pole P180883 rest against the bottom of the easmg and these pole pieces, together with the magnet 2, are held in position b screws 5 which pass through the casing an nuts 6 on the inner ends of the screws. The bolts 5 pass through a disc of strong insulating material 7 such as dielecto, micarta or the like, before the application of the nuts 6, so that the disc 7 serves to clamp the ma et and le piece securely within the receiver shell. A central hole 8 is out in the,disc 7 to recgive the spools forming the electromagnet. Each spool has a protecting head 9, preferably of insulating material, which heads are held in place on the core through the medium of snap springs 10 that engage slight notches in the outer ends of the cores 4. I prefer this method of securing the spool heads in place over the old methods of stacking the outer end of the cores as is almost universal] done for the reason that during the stac ing operation some damage may be done to the coil, which consists of very fine wire and such coils will not stand much abuse. The disc 7 carries a pair of connectors 11. These connectors have ears 12 which project through holes in the disc 7 and are riveted over on the underside. The ltion 13 to which the outer ends 15 of the e ectromagnet coils are attached. The cord terminals 16 are adapted to enter an openin 17 formed by bending over a portion 18 oft e terminal. A screw 19 serves to force the part 18 tightly against the terminal 16, clamping it in posh tion.

From the drawings and the description above, it will be seen that the disc 17 with the terminals mounted thereon forms a unitary structure which serves to make the connection between the outside conductors and the electromagnet, as well as a clam ing means for holding the working parts 0 the receiver outside of the diaphragm in posi tion.

It will be understood that my invention is I susceptible .of certain chan es in the details 10 without departing from t e spirit of the same and the scope ofthe appended claims.

Having thus described my invention what I claim 1s: I

1. In a device of the class described, acas- 11 ing of insulating material containing a permanent magnet positioned on the bottom of the casing and an electro-magnethaving cores engaging the magnet pole ends, a disc of insulated material positioned over the permanent magnet and encompassing the electro-magnet with means passing through said disc and casing only for clamping the permanent and electro-magnets in position and connectors on said disc adapted to receive cord terminals and the ends of the electro-magnet.

2. In a device of the class described, acasing, a permanent magnet and an electromagnet, a unitary device for clamping the said magnets in operative position within the casing, said unitary device consisting of a disc of insulatingmaterial having connectors preferably riveted thereto, said connectors adapted to receive cord terminals and the outer ends of the electro-magnet and clamping means including a bolt passing through only the casing and disc.

. Intestimony whereof, I afiix my signature.

EDWARD B. NOWOSIELSKI. 

